Gauge cock



H. A. FHACKELTON.

GAUGE COCK.

APPLICATION FILED APR. 26, 1921.

1,4};30,368 PatentedSept. 26, 1922.

FllG- 1:-

Patented Sept. as, 1922.

HENRY A. FRAOKELTON, or soHENEoTAnY, NEW roan.

GAUGE oooz.

Application filed April 26 5, 1921. Serial No. 464,553.

while the boiler is under steam. The ob-' ject ofmy invention is to provide a gauge cock of such type in which renewal or repair of the valve seat may be made, whenever'reql iired, more expeditiously and with less manipulation of parts than has heretofore been found practicable. 4

The improvement claimed is hereinafter fully set forth. I

In the accompanying drawing: Figure 1 is a longitudinal central section through a gauge cock embodying my invention; and,

Figs. 2 and 3, transverse sections through the same, on the lines a a and b 6, respectively, of Fig. 1.

In the practice of my invention, referring Idescriptively to the specific embodiment thereof which is herein exemplified, I provide a tubular body, 1, .which is externally threadedat and-adjoining one of its ends, for connection to a boiler sheet, and has a collar, 1, at its opposite end, forming an abutment I it is connected to a tubular bonnet, 3.- An

annular valve se'a't, 4, of-metal or suitable composition,is fitted on the top of the body, 1, and is clamped between said body and the bonnet, 3, when the body and bonnet are connected by the coupling nut, 2,-which is internally threaded, to engage an external thread on the bonnet. A nipple, 2 for the discharge of fluid from: the gauge cock, is connected to the wall of thebonnet.

A main valve stem, 5, passes through a packing nut, 6, which closes the upper end of the'bonnet, and extends through the latter into the body. on the upperendof the valve stem and squared faces, 5*, are formed upon said stem than the opening in the valve seat, 4, which the body,

for ,a coupling nut, 2, by which A hand wheel, 5 is fixed difference in diameter, together with the reductlon of transverse section effected by the formatlon of the squared faces on the stem provides sufficient space around the stem for the passage of fluid to the discharge nipple. A screw thread, 5,

which is ordinarily, and preferably, of left hand lead, is cut on the valve stem, said thread engaging a corresponding internal thread on the bonnet.

A supplemental valve stem, 7, is fitted in 1, said stem having a screw thread, 7 of similar lead to that of the main valve stem, out upon it, which thread engages a corresponding internal thread in the body. The upper end of the stem, 7, is faced off to form an operating closurevalve, 7 which seat, 4, and a repair closure valve, 7 adapted to make contact with a valve seat, 1", in the body, is formed on the lower end of the stem, 7. A sockiet, 7 of corresponding tion of the valve stem, 5, is formed 'at the upper end of the valve stem, 7, and the squared end portion engages said socket, therebyforming'a detachable clutch connection of the two'valve stems. Channels; 7*, are milled in the threaded portion of the stem, 7, to permit thefree passage of fluid through the body, from tion to thevalve seat, 4.

In the'operation ofa gauge cock of the "construction above described, the operating normally seated, and

closure valve, 7 bein the repair closure va ve, 7, unseated, when it is desired to deliverfluid from the gauge cook, the .valve stem, 7, is turned to the left a suflicient distance tolunseat the valve, 7", Without seating'the valve, 7.. When, for purposes of renewal or repair,.it becomes necessary to temporarily close communica-- tion with the boiler, the stem, 5, is turned sufliciently'further to the left to seat the valve 7 The coupling nut,2, is then backed off the bonnet, 3, and the bonnet. and stem,

5 removed from the body, thereby leaving the valve seat, 4, full} accessible for renewal or repair, upon thejcoinpletionpf which the parts may be quickly replaced in operative position.

The expedition with which renewal or repair of the. valve seat may, as above described, be effected, and the small extent ofmanipulation of parts required therein, will the boiler connec-' 1s adapted to make contact with the valve transverse section to the squared end porbe obvious to those familiar with the operation of locomotive and other steam boilers.

ll claim as my invention and desire to secure by Letters Patent:'

1. The combination, in a gauge cock, of a tubular body; a tubular bonnet; an interposed valve seat; a coupling nut, detaohably connecting the body and bonnet; a main valve stem, having a threaded connection With the bonnet; a supplemental valve stem, having a threaded connection With the body; an operating closure valve and a repair closure valve, carried by said supplemental valvestemyand means for detachably connecting the main and supplemental valve stems. V

2. The combination, in a gauge cock, of a tubular body; a tubular bonnet; an interposed valve seat; a coupling nut, detachably connecting the body and bonnet; a main valve" stem, having a'screW threaded connection with the bonnet; a supplemental valve stem, having a threaded connection with the body; an operating closure valve and a repair closure valve carried by said. supplemental valve stem; and a clutch connection, by Which the main valve stem is engaged With thesupplemental valve stem.

3. The combination, in a gauge cock, of a tubular body; atubular bonnet; an interposed valve seat; a coupling nut, detachably connecting the body and bonnet; a ma1n,valve stem, having a threaded connection with the bonnet and a squared end portion; a supplemental valve stem, having a threaded connection with the body and a socket engaging the end-portion of the main valve stem; an operatmg closure valve on .said supplemental valve stem, adapted to 

